#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>

int main()
{
  pid_t id=fork();
 if(id==0)
 {
  printf("before:I am a process,pid:%d,ppid:%d\n",getpid(),getppid()); 
  sleep(5);
  //execl("/usr/bin/ls","ls","-a","-l",NULL);
  execl("/usr/bin/bash","bash","test.sh",NULL); 
  printf("after:I am a process,pid:%d,ppid:%d\n",getpid(),getppid());
  exit(0);
 }
  pid_t ret=waitpid(id,NULL,0);
  if(ret>0)
  {
    printf("wait success,ppid:%d,ret id:%d\n",getpid(),ret);
  }

  sleep(5);
  return 0;
}
